added to NmssmSoftsusy class an alternative routine for stting the treelevel Higgs mass matrices, which does not substitution via the tree level EWSB conditions, treeHiggsAlt.  This allows s = 0, and may be useful in the general NMSSM and taking a simple MSSM limit (not the usual Z3 limit). Added terms to treeHiggs which go like mu * lambda, which are not present in Ellwanger's review because he chooses to set mu = 0, with a redifinition of the svev.  I decided against doing this as I want to use mu in the EWSB conditions for some cases in the general NMSSM and because I think mu and svev have such different origins their distributions will be different and this will affect eg naturalness.  Added guessSusyAtMt routine to NmssmSoftsusy class. None of these have been tested yet may well be buggy currently.